Hey,
the issue could be caused by a greylist filter or delay filter on your
email server. Depending on the smtp error message and code the delay
filter returns to the sending server, in some cases the interpretation
is wrong or its simply incompatible. So, while your server sends a "I am
temporarily unavailable, please send again later", the MTN server could
understand: delivery error and sends a duplicate of the message.
Eventually both will be delivered later on. Check the server date/time
in the message header and see if there is some sort of pattern, e.g.
every 10, 15, 30, 60 minutes.
Although, the smtp error codes and respective behaviours are clearly
stipulated within the IETF, I've observed that some email server
products have issues with delay filters. That is that some emails cannot
be delivered properly or receiving duplicates of (mostly) spam messages
or newsletter just like in your case.
The only mitigation is to set the MTN server on the delay filter's
white-list. Ask your email server admin if they use a greylist or delay
filter.
Regards,
Rocco
On 17/01/2011 10:53 AM, Emmanuel Mulo wrote:
The message appears in webmail as well. And looking at the headers,
there are different delivery times for each message.
The admin on my side suggests that there is a timeout issue between
the servers.. the mailscan-01 does not wait till the end of message
but instead times out and resends the message. It is *still* being
resent till now! Also the admin thinks its to do with the message
length... I took a look and sure enough the messages that are being
delivered multiple times are all very long messages.
Any idea who the admin is?
On 13/01/2011 11:33, Simon Vass wrote:
Maybe ry using mail2web to check your mailbox and see if the messages
appear there also.
Simon Vass
Managing Director
E-Tech Uganda Ltd
http://www.etech.ug
Tel: +256 (0) 312260620 or (0) 312260621
email: [email protected]
skype: e-techservicedesk
----- Original Message -----
From: "Okalany Daniel"<[email protected]>
To: "Uganda Linux User Group"<[email protected]>
Sent: Thursday, 13 January, 2011 1:06:38 PM
Subject: Re: [LUG] mailscan-01.srv.mtn.co.ug admin?
Since no one else is complaining, probably means it is an issue on
your end.
I had something similar sometime back,
MS Outlook would re POP all emails in case it shutdown uncleanly.
-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of
Emmanuel Mulo
Sent: Thursday, January 13, 2011 12:57 PM
To: [email protected]
Subject: [LUG] mailscan-01.srv.mtn.co.ug admin?
hi all,
who is the admin for this server? I already mentioned that I am
receiving
multiple copies (over 50 copies) of the same messages from this
server. it
keeps resending a message from 3 days ago.
cheers, Mulo
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responsible for them in any way.
_______________________________________________
The Uganda Linux User Group: http://linux.or.ug
Send messages to this mailing list by addressing e-mails to:
[email protected]
Mailing list archives: http://www.mail-archive.com/[email protected]/
Mailing list settings: http://kym.net/mailman/listinfo/lug
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The Uganda LUG mailing list is generously hosted by INFOCOM:
http://www.infocom.co.ug/
The above comments and data are owned by whoever posted them
(including attachments if any). The mailing list host is not
responsible for them in any way.
_______________________________________________
The Uganda Linux User Group: http://linux.or.ug
Send messages to this mailing list by addressing e-mails to: [email protected]
Mailing list archives: http://www.mail-archive.com/[email protected]/
Mailing list settings: http://kym.net/mailman/listinfo/lug
To unsubscribe: http://kym.net/mailman/options/lug
The Uganda LUG mailing list is generously hosted by INFOCOM:
http://www.infocom.co.ug/
The above comments and data are owned by whoever posted them (including
attachments if any). The mailing list host is not responsible for them in any
way.
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